import 'dart:ui';

import 'package:flutter/material.dart';
import 'package:magic_car/common/nodata.dart';
import 'package:magic_car/user/anserdetail.dart';
import 'package:magic_car/util/HttpHelper.dart';
import 'package:magic_car/util/colors.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:toast/toast.dart';

class AnswerPage extends StatefulWidget {
  AnswerPage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<AnswerPage> {
  List formList;
  ScrollController _controller = new ScrollController();
  int page = 1;
  bool end = false;
  String keyword = "";
  var imgsLeng = 0;

  initState() {
    super.initState();
    _controller.addListener(() {
      if (_controller.position.pixels == _controller.position.maxScrollExtent) {
        print('滑动到了最底部');
        loadData();
      }
    });

    formList = [];
    loadData();
  }

  //加载数据
  loadData() async {
    // if(keyword!=""){
    //   print(keyword);
    // if(end)return;
    // }
    if (end) return;
    Map<String, String> map = new Map();
    SharedPreferences pref = await SharedPreferences.getInstance();
    map["id"] = pref.getString('uid');
    map["page"] = page.toString();
    map["keyword"] = keyword;
    print(map);

    HttpHelper.post(HttpHelper.API_GetAskList, (data) async {
      if (data != null) {
        print(data);
        print(data["info"].length.toString());
        if (data["info"].length == 0) {
          Toast.show('暂无更多数据', context);
        } else {
          if (data["code"].toString() == "1") {
            if (data["info"].length < 10) {
              setState(() {
                end = true;
              });
            }
            if (page > 1) {
              List add = data["info"];
              formList.addAll(add);
              setState(() {
                formList = formList;
              });
            } else {
              setState(() {
                formList = data["info"];
                page = page + 1;
              });
            }
          }
        }
      }
    }, params: map);
  }

  Widget buildImgs(item) {
    List<Widget> tiles = [];

    Widget content;

    List items = item["image_url"];
    print(items.length.toString());

    for (var i = 0; i < items.length; i++) {
      //List temp1 = items[i] as List;
      tiles.add(Padding(
        padding: new EdgeInsets.fromLTRB(5, 0, 0, 10),
        child: GestureDetector(
            onTap: () {
              // print('点击查看图片');
              // Navigator.of(context).push(
              //   NinePicture(items, i),
              // );
            },
            child:
              items[i]==""?Container(height:0):
             Image.network(items[i], width: 100, height: 100,fit: BoxFit.fill,)
             ),
      ));
    }
    content = new Wrap(
        children: tiles //重点在这里，因为用编辑器写Column生成的children后面会跟一个<Widget>[]，
        //此时如果我们直接把生成的tiles放在<Widget>[]中是会报一个类型不匹配的错误，把<Widget>[]删了就可以了
        );
    return content;
  }

  Widget buildcontent() {
    List<Widget> tiles = [];
    Widget content;
    if (formList.length > 0) {
      for (var item in formList) {
        tiles.add(Padding(
            padding: new EdgeInsets.fromLTRB(15, 5, 15, 0),
            child: Container(
              decoration: new BoxDecoration(
                color: Colors.white,
                borderRadius: BorderRadius.circular(7),
              ),
              child: new GestureDetector(
                  behavior: HitTestBehavior.opaque,
                  onTap: () {
                    Navigator.of(context)
                        .push(new MaterialPageRoute(builder: (_) {
                      return new AnswerdeailPage(item["id"].toString());
                    }));
                  },
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.start,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: <Widget>[
                      Padding(
                        padding: new EdgeInsets.fromLTRB(10, 5, 20, 0),
                        child: Column(
                          children: <Widget>[Text(item["name"],style: TextStyle(fontSize: 15,fontWeight: FontWeight.w600),)],
                        ),
                      ),
                      item['image_url'].length > 0
                          ? Padding(
                              padding: new EdgeInsets.fromLTRB(10, 10, 20, 0),
                              child: buildImgs(item),
                              // child: Row(
                              //   children: <Widget>[Text('总试题数：16')],
                              // ),
                            )
                          : new Container(height: 0),
                      Padding(
                        padding: new EdgeInsets.fromLTRB(10, 5, 20, 10),
                        child: Row(
                          children: <Widget>[
                            Expanded(
                                flex: 1,
                                child: Text(
                                  item["add_time"],
                                  style: TextStyle(
                                      color: Color.fromRGBO(153, 153, 153, 1),
                                      fontSize: 13),
                                )),
                            // Expanded(
                            //   flex: 1,
                            //   child: Align(
                            //       alignment: Alignment.centerRight,
                            //       child: Container(
                            //           height: 30,
                            //           child: new RaisedButton(
                            //             child: Text('我来回答'),
                            //             textColor:
                            //                 Color.fromRGBO(27, 182, 251, 1),
                            //             color: Color.fromRGBO(201, 235, 250, 1),
                            //             onPressed: () {
                            //               Navigator.of(context).push(
                            //                   new MaterialPageRoute(builder: (_) {
                            //                 return new AnswerdeailPage(item["id"].toString());
                            //               }));
                            //             },
                            //           ))),
                            // )
                          ],
                        ),
                      ),
                    ],
                  )),
            )));
      }
    }
    content = new Column(
        children: tiles //重点在这里，因为用编辑器写Column生成的children后面会跟一个<Widget>[]，
        //此时如果我们直接把生成的tiles放在<Widget>[]中是会报一个类型不匹配的错误，把<Widget>[]删了就可以了
        );
    return content;
  }

  Widget build(BuildContext context) {
    return
        // new MaterialApp(
        //     title: '结构件',
        //     home:
        new Scaffold(
            appBar: new AppBar(
              title:Center(child: new Text(
                '问答',
                style: TextStyle(color: Colors.black,),
              )),
              backgroundColor: Colors.white,
              elevation: 0,
              // backgroundColor: Color.fromRGBO(255, 204, 48, 1),
            ),
            // floatingActionButtonLocation: FloatingActionButtonLocation.endFloat,
            // floatingActionButton: FloatingActionButton(
            //   onPressed: () {
            //     Navigator.pushNamed(context, "upAsk");
            //   },
            //   child: Icon(
            //     Icons.add,
            //     color: Colors.white,
            //   ),
            //   backgroundColor: Colours.app_main,
            // ),
            body: new Center(
                child: Container(
                    decoration: new BoxDecoration(
                       color:Colours.base_page_color,
                      // color: Color.fromRGBO(245, 245, 245, 1),
                    ),
                    // child: new Column(children: <Widget>[
                    //   Container(
                    //     width: 200,
                    //     height: 50,
                    //     child: Text('1111111'),
                    //   ),
                    // child: new ListView(
                    //   children: <Widget>[buildcontent()],
                    // )
                    child:
                        // new ListView(children: <Widget>[
                        Stack(
                      children: <Widget>[
                        Align(
                          alignment: Alignment.topLeft,
                          child: SizedBox(
                              width: double.infinity,
                              height: 60,
                              child: Padding(
                                  padding:
                                      new EdgeInsets.fromLTRB(15, 10, 15, 10),
                                  // padding: new EdgeInsets.all(10),
                                  child: Container(
                                      child: Row(
                                          mainAxisAlignment:
                                              MainAxisAlignment.end,
                                          children: <Widget>[
                                        Expanded(
                                          child: new Container(
                                            child: new TextField(
                                              onSubmitted: (value) {
                                                print(value);
                                                //if(value=="")return;
                                                setState(() {
                                                  keyword = value;
                                                  page = 1;
                                                  end = false;
                                                });
                                                print('搜索');
                                                loadData();
                                              },
                                              // controller: _phonecontroller,
                                              decoration: new InputDecoration(
                                                  border: InputBorder.none,
                                                  hintText: '搜索',
                                                  prefixIcon:
                                                      Icon(Icons.search)),
                                            ),
                                            decoration: new BoxDecoration(
//背景
                                              color: Colors.white,
                                              //设置四周圆角 角度 这里的角度应该为 父Container height 的一半
                                              borderRadius: BorderRadius.all(
                                                  Radius.circular(25.0)),
                                              //设置四周边框
                                              border: new Border.all(
                                                  width: 1,
                                                  color: Colors.white),
                                            ),
                                          ),
                                        ),
                                        // FlatButton(
                                        //     onPressed: () {
                                        //       Navigator.pushNamed(context, "upAsk");
                                        //     },
                                        //     child: new Text(
                                        //       "我要提问",
                                        //       style: TextStyle(
                                        //           color: Color.fromRGBO(
                                        //               27, 182, 251, 1),
                                        //           fontSize: 13),
                                        //     ))
                                      ])))),
                        ),
                        Align(
                            alignment: Alignment.bottomCenter,
                            child: Padding(
                                padding: new EdgeInsets.fromLTRB(0, 60, 0, 10),
                                child: new RefreshIndicator(
                                  onRefresh: _onRefresh,
                                  child:
                                  formList.length==0&&page==1?Nodata():
                                   new ListView(
                                      controller: _controller,
                                      children: <Widget>[buildcontent()]),
                                ))),
                      ],
                    )))
            //])))),
            );
  }

  Future<Null> _onRefresh() async {
    await Future.delayed(Duration(seconds: 3), () {
      print('refresh');
      setState(() {
        page = 1;
      });
      loadData();
    });
  }
}
